U.S. Air Force Staff Sgt. Ian Ivey, 27th Aircraft Maintenance Unit dedicated crew chief, prepares a 27th Fighter Squadron pilot for his flight at Joint Base Langley-Eustis, Virginia, Feb. 14, 2018. Crew chiefs are responsible for pre-flight and post-flight inspections of their assigned aircraft. (U.S. Air Force photo by Senior Airman Derek Seifert)